Lev Borisovich Okun

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Lew Borissowitsch Okun ( Russian Лев Борисович Окунь , English transliteration Lev Okun; born June 7, 1929 in Sukhinichi , Kaluga Oblast ; † November 23, 2015 ) was a Soviet or Russian theoretical physicist who mainly worked on elementary particle physics .

Career

Okun was a student of Arkadi Migdal and Isaak Pomeranschuk (and Lev Landau ). He graduated from the Moscow Institute for Technical Physics (MEPhI) in 1953 and then went to ITEP , where he later became director of the laboratories for theoretical physics. In addition, since 1962 he was professor of elementary particle physics at the Moscow Institute of Physics and Technology .

plant

Okun was one of the leading elementary particle physicists in the Soviet Union. In the 1960s, independently of Shoichi Sakata, he developed a forerunner and early competitor of the Quark model, the Sakata or Okun-Sakata model. With Igor Kobsarew and Jakow Seldowitsch he investigated vacuum domain walls in 1974 with Kobsarew and Michail Woloschin 1974 quantum tunnels from metastable vacuum bubbles in quantum field theory . In the 1990s he worked with Wictor A. Nowikow and Michail I. Wysozki on the calculation of electroweak corrections in the production of Z bosons .

The Okun-Pomeranschuk theorem from 1956 states the asymptotic equality of the interaction cross-sections for particles in the same isospin multiplet for high energies.

In 1957 he published a work with Boris Joffe and Alexei P. Rudik on parity violation in weak interaction.

At a lecture in 1962 he introduced the term hadron .

In the 1970s he studied with Wladimir Gribow , Valentin Sakharov and Alexander Dolgow the asymptotic behavior of the weak interaction at high energies. At the end of the 1970s, together with Sakharov, Woloschin, Michail Schifman , Arkady Vainshtein and VA Novikov, he developed QCD rules for determining the mass and lifetime of hadrons.

He dealt with astroparticle physics early on and in 1965, together with SB Pikelner and Zeldovich, calculated the current density of heavy relic particles (at that time with fractional charges similar to quarks) from the early days of the universe. With Pomeranschuk and Kobsarew, he proposed the existence of mirror worlds in the 1960s, which only interact gravitationally with the known universe (a concept that later became relevant again in Brane-Welt cosmologies).

Okun was also known for his pedagogically skillful presentations of particle physics in books, essays and lectures.

Honors and memberships

Okun had been a corresponding member of the Russian Academy of Sciences since 1966, and a full member since 1990.

From 1980 to 1985 he was on the Scientific Policy Committee of CERN ; he was also on the scientific advisory board of DESY . He was a Fellow of the Institute of Physics and a member of the Academia Europaea and the New York Academy of Sciences .

Fonts

Web links

Individual evidence

  1. ↑ Lev Borisovich Okun (1929-2015)
  2. ^ VA Novikov, LB Okun, AN Rozanov, MI Vysotsky: Theory of Z-Boson decays. In: Rept.Prog.Phys. Vol. 62, 1999, pp. 1275-1332.
personal data
SURNAME Okun, Lev Borisovich
ALTERNATIVE NAMES Окунь, Лев Борисович (Russian)
BRIEF DESCRIPTION Soviet or Russian physicist
DATE OF BIRTH June 7, 1929
PLACE OF BIRTH Sukhinichi , Kaluga Oblast
DATE OF DEATH 23rd November 2015